 ///
 /// @file    namespace1.cc
 /// @author  lemon(haohb13@gmail.com)
 /// @date    2016-02-24 17:56:34
 ///
 
#include <iostream>

using namespace std;//编译指令

namespace A
{
void displayA()
{
	cout << "This is A" << endl;
	
}
}


namespace B
{
void displayB()
{
	A::displayA();
	cout << "This is B" << endl;
}
}


int main(void)
{
	B::displayB();
}
